London's Pulse: Medical Officer of Health reports 1848-1972
View report page
Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Croydon 1938
[Report of the Medical Officer of Health for Croydon]
This page requires JavaScript
The 288 samples of Ordinary Milk contained total bacteria per m.l. as follows:—
| 0—1,000 | 24 |
| 1,000—5,000 | 60 |
| 5,000-10,000 | 47 |
| 10,000—20,000 | 35 |
| 20,000—30,000 | 28 |
| 30,000—40,000 | 13 |
| 40,000—50,000 | 14 |
| 50,000—100,000 | 14 |
| 100,000—150,00 | 11 |
| 150,000—200,000 | 6 |
| 200,000—250,000 | 8 |
| 250,000—500,000 | 11 |
| 500,000—750,000 | 3 |
| 750,000—1,000,000 | 1 |
| 1,000,000—2,000,000 | 5 |
| Over 2,000,000 | 8 |
| 288 |
Seven samples were taken for inoculation test only.
There is no standard fixed for total bacteria per millilitre in
ordinary commercial milk, but for the purposes of comparison a
maximum count of 100,000 per m.l. is taken. It will be seen
that 235 of the samples contained total bacteria in accordance
with that comparison. It has to be remembered that a proportion
of this milk has been subjected to commercial pasteurisation.
Four samples of sterilised milk were taken during the year
and contained bacteria per millilitre as follows:—
100 3
400 1
4